Viking MICROFAST VK350 Technical Data Manual

Telephone: 269-945-9501 Technical Services: 877-384-5464 Fax: 269-818-1680 Email: techsvcs@vikingcorp.com
Visit the Viking website for the latest edition of this technical data page: www.vikinggroupinc.com
1. DESCRIPTION
The Viking Microfast
thermosensitive, glass-bulb spray sprinkler available in several different finishes, tem-
perature ratings, and K-Factors to meet design requirements. The special Polyester,
and Electroless Nickel PTFE (ENT) coatings can be used in decorative applications
where colors are desired. In addition, these coatings have been investigated for instal-
lation in corrosive environments and are listed/approved as indicated in the Approval
Charts.
2. LISTINGS AND APPROVALS
cULus Listed: Category VNIV
FM Approved: Class Series 2000
VdS Approved: Certificates G414017, G414018, G4980020, and G4060054
LPCB Approved: Certificate 096e/03
CE: Standard EN 12259-1,DOP Sprinklers_VdS_23-5-13, DOP
Sprinklers_LPCB_5-2-19 & DOP_VK350ENT_6-11-19
China Approval: Approved according to China GB standard
MED Certified: Standard EN 12259-1, EC-certificate of conformity 0832-
MED-1003
NOTE: Other International approval certificates are available upon request.
Refer to Approval Chart 1 and Design Criteria cULus Listing requirements, and refer to Approval Chart 2 and Design Criteria FM
Approval requirements that must be followed.
3. TECHNICAL DATA
Specifications:
Minimum Operating Pressure: 7 psi (0.5 bar)*
Maximum Working Pressure: 175 psi (12 bar) wwp.
Factory tested hydrostatically to 500 psi (34.5 bar)
Testing: U.S.A. Patent No. 4,831,870
Thread size: 1/2" NPT, 15 mm BSPT, 3/4" NPT, or 20 mm BSPT
Nominal K-Factor: 8.0 U.S. (115.2 metric**)
Glass-bulb fluid temperature rated to -65 °F (-55 °C)
Overall Length: 2-5/16" (59 mm)
*cULus Listing, FM Approval, and NFPA 13 installs require a minimum of 7 psi (0.5 bar). The minimum operating pressure for LPCB and CE
Approvals ONLY is 5 psi (0.35 bar).
Material Standards:
Frame Casting: Brass UNS-C84400
Deflector: Copper UNS-C19500
Bulb: Glass, nominal 3 mm diameter
Belleville Spring Sealing Assembly: Nickel Alloy, coated on both sides with PTFE Tape
Screw: Brass UNS-C36000
Pip Cap and Insert Assembly: Copper UNS-C11000 and Stainless Steel UNS-S30400
For Polyester Coated Sprinklers: Belleville Spring-Exposed
For ENT Coated Sprinklers: Belleville Spring-Exposed, Screw and Pipcap - ENT plated.
Ordering Information:
Order Viking Microfast
then the appropriate suffix for the temperature rating to the sprinkler base part number.
Finish Suffix: Brass = A, Chrome = F, White Polyester = M-/W, Black Polyester = M-/B, and ENT = JN
Temperature Suffix (°F/°C): 135°/57° = A, 155°/68° = B, 175°/79° = D, 200°/93° = E, and 286°/141° = G
Form No. F_033014 20.10.22
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Quick Response Upright Sprinkler VK350 is a small,
®
(Also refer to the current Viking price list.)
Quick Response Upright Sprinkler VK350 by first adding the appropriate suffix for the sprinkler finish and
®
Rev 20.1
TECHNICAL DATA
MICROFAST QUICK
®
RESPONSE UPRIGHT
SPRINKLER VK350 (K8.0)
Replaces Form F_033014 Rev 19.2
(Revised CE approvals.)
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